diff --git a/frontend/app/player/MessageDistributor/StatedScreen/Screen/BaseScreen.ts b/frontend/app/player/MessageDistributor/StatedScreen/Screen/BaseScreen.ts
index f3e332aa7..e2cd635fd 100644
--- a/frontend/app/player/MessageDistributor/StatedScreen/Screen/BaseScreen.ts
+++ b/frontend/app/player/MessageDistributor/StatedScreen/Screen/BaseScreen.ts
@@ -128,7 +128,12 @@ export default abstract class BaseScreen {
 
   getElementBySelector(selector: string): Element | null {
     if (!selector) return null;
-    return this.document?.querySelector(selector) || null;
+    try {
+      return this.document?.querySelector(selector) || null;
+    } catch (e) {
+      console.error("Can not select element. ", e)
+      return null
+    }
   }
 
   display(flag: boolean = true) {
diff --git a/frontend/app/player/MessageDistributor/managers/DOMManager.ts b/frontend/app/player/MessageDistributor/managers/DOMManager.ts
index c4a4b5ab0..0db1a199d 100644
--- a/frontend/app/player/MessageDistributor/managers/DOMManager.ts
+++ b/frontend/app/player/MessageDistributor/managers/DOMManager.ts
@@ -231,7 +231,11 @@ export default class DOMManager extends ListWalker<TimedMessage> {
           node.sheet.insertRule(msg.rule, msg.index)
         } catch (e) {
           logger.warn(e, msg)
-          node.sheet.insertRule(msg.rule)
+          try {
+            node.sheet.insertRule(msg.rule)
+          } catch (e) {
+            logger.warn("Cannot insert rule.", e, msg)
+          }
         }
       break;
       case "css_delete_rule":